social butterfly
US /ˈsoʊʃəl ˈbʌtərˌflaɪ/
UK /ˈsoʊʃəl ˈbʌtərˌflaɪ/
1.
an outgoing, gregarious person who loves to socialize and flit from one social event or group of people to another
:
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My sister is a real social butterfly; she knows everyone at the party.
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He's always been a social butterfly, making friends wherever he goes.